Stove.



E. R. CAHOONB.

STOVE. APPLICATION FILED ov. 30, 1903.

Patented Mar. 9, 1909.

2 SHEETSSHBET 1.

With cone:

0., WASHINGTUN, b. c.

E. R. CAHOO-NIEI.-

STOVE. APPLIGATION FILED I IOV. 30, 1903.

Patented Mar. 9, 1909. 2 SHEETS-SHEET 2.

7n: NORRIS Pm-sns cm, wasmucwm n. c.

EDWIN R. GAHOONE, OF

SUMMIT, JERSEY.

STOVE.

Specification of Letters Patent.

Patented March 9, 1909.

Application filed November 30, 1903. Serial No. 183,201.

To all whom it may concern:

Be it known that I, EDWIN R. CAnooNn, a citizen of the United States,residing at Summit, in the county of Union and State of New 1 Jersey,have invented certain new and useful Improvements in Stoves, of whichthe fol lowing is a specification.

This invention relates to improvements in stoves, and primarily to thedetails of construction thereof.

The object of the invention is to provide an air heating chamber at thetop of the stove structure, that the air therein may be heated to thebest advantage, while being delivered to the fuel. Furthermore, Ipropose forming this chamber in such a manner that a pocket thereof willdepend somewhat within the stove, and to insure the air being heatedtherein, I arrange a baffle plate to deflect the incoming air in contactwith the said pocket the chamber communicates with air delivering meansof suitable construction, such for instance as a tube, and air may beintroduced to the chamber direct from the atmosphere or preheated ininside or outside 3 ducts leading from the bottom of the stovestructure.

A further object of the invention is to construct the fire pot of aseries of spaced apart bars, communicating with an air heating chambersurrounding the pot, to introduce streams of heated air to the fuel fromthe sides, to cooperate with the heated air introduced from the airheating chamber above.

In order therefore to carry out the objects of this invention to thebest possible advantage, I have found it necessary to devise specificdetails of construction, which will be hereinafter described andparticularly pointed out in the claims.

In the drawings, Figure 1 is a vertical sec tion of my improved stove.Fig. 2 is a detail horizontal section of a fragment of the fire pot.Fig. 3 is a vertical central sectional view of a modified form of myinvention.

Fig. 4 is a plan view of the same, the upper portion of the stove beingremoved, to more clearly illustrate the damper. Fig. 5 is a detailhorizontal section on the line 5-5, Fig. 3, the damper being turned todirect the heated air direct to the exit fine.

The numeral 1 represents the stove casing; 2 the base; 3 the fire pot; 4the top; 5 the supplemental top, and 5 the exit flue. A pocket 6 dependsfrom the supplemental I top 5 into the stove toward the fire pot, and Kher 7 is ad to the fuel communicating with the pocket 6 is an airheating chamber 7. A baffle plate 8 is suspended from the top 4 into thepocket 6, to cause the air to contact with the walls of said pocket andprolong its travel to the fuel. The Walls of the chamber 7 may haveopenings 9 for the admission of air, and these openings may becontrolled by a damper 10. Air thus admitted to the chamber direct fromthe atmosphere may not always suffice to give the best combustion, asthe chilling effect often tends to reduce the temperature. However, toovercome this Ohjection, I have provided ducts 12 on the inside andducts 12 on the outside, which open to the atmosphere at or near thebottom of the stove, and being positioned to be heated by the productsof combustion in the fire pot, the air before entering the chamber 7necessarily becomes highly heated. Dampers 13 may be conveniently placedto regulate the supply of air passing into the tubes, and ifcircumstances may warrant the dampers 10 and 13 may be manipulated so asto supply air to the chamber from either or both openings 9 and ducts 12and 12. Above the top 4:, is an auxiliary air heating chamber 4communicating with a tube 13, by means of openings 14*. The chamber 7communicates with the tube 13 by means of an opening 14, a damper 15controlling the admission of air to the tube. Air enters the chamber 46direct from the atmosphere and is introduced to the tube, 13 through theopenings 14*, when air from the chamthrough the said tube. To stop thesupply of air to the fire pot, the damper 15 is turned, an opening 15therein registers with an opening 14 in the tube and the air from thechamber passes direct to the exit fine.

The fire pot and its adjuncts form an important part of this invention,in that by its peculiar construction I am enabled to introduce a seriesof streams or sheets of heated air to the fuel, to cooperate and mixwith the air introduced to the top thereof by the tube. The fire pot 3is composed of a series of individual bars 17, supported on a casting 18at the lower end, and by a casting 19 near their upper ends. Each bar isstraight, as shown at 20, at the end of which is formed an innerdepression 22, above which is formed a rounded portion 23, and then itin clines outwardly toward the casing. Each bar is provided with sidegrooves 25, and a projection 26 which takes into openings 27 in thecasting 18, while other projections 27 a opposite depression 22 takeinto openings 29 in the casting 19. The details of these bars asdescribed, form a series of air heating chambers 30 into which andthrough which air is introduced from the ash pit 30, and by reason ofthe Varying area of the chambers formed between the fire pot and thestove casing the air is caused to contact with the structure, whichthoroughly heats and mixes it with the gases liberated from the fuel.

When the fire pot is assembled, the bars are spaced apart slightly forthe passage of air and gas, and when the fuel becomes packed in placesthe air being introduced around it, it soon consumes the adjacent strataand the pack crumbles. The depressions 22 form an undercut pocket orchamber which when the fuel packs above or below it, allows of air beingintroduced downwardly from the chambers 3O as indicated by the arrows inFig. 1.

A stove thus constructed is admirably adapted for consuming fuels ofquestionable quality, as the various air currents serve to attack it atsuch points that ignition is sure to result. This is particularly trueof low grade fuels, which cake or pack when they reach a certaintemperature.

The air entering the chamber 7 strikes the baffie plate 8 and isdeflected down and under the same, through the opening 14 to the tube,and I desire to emphasize at this point the fact that inasmuch as thestove shown in the drawing is of the rip-burning type, the prodnets ofcombustion in escaping to the exit flue contact with and highly heat thepocket 7. It is for this reason I desire to locate the pocket at the topof the stove, as it positively insures the ingoing air being heated. Theair delivered to the top of the fuel through the tube has a tendency todrive the streams of air from between the bars down into the fuel, whichdisseminates and mixes therair with the liberated gases. Furthermore themixture of air and gas rising from the fuel causes an additional mixingof a portion of the air from the tube, with the result that the gasesare subjected to and agitated by various currents of heated air, and acom paratively perfect combustion is produced. I may use the innercasing 40 above the fire pot, to form an auxiliary air heating chamber41. The casing 40 is perforated, and the air from around the fire pot isintroduced to the escaping products of combustion just before the exitflue is reached.

In the modifications shown in Figs. 3 and 4, I have shown two airheating chambers 50 and 51 above the top of the tube 13. Air enters thechamber 50 through openings 52, and then passes through openings 53 in apartition 54 to the chamber 51, from whence the now highly heated airpasses through an opening 55 into the chamber 7, and pocket 6 and intothe top of the tube 13", through the openings 57. The damper 58 is sosha ed and mounted that the openings 55 an 57 are simultaneously coveredand uncovered to regulate the air entering the fire pot. While I haveomitted the tubes 12 and 12 in the modification it is obvious they maybe employed if desired.

The advantages incident to the passing of air through several chambersand introducing a plurality of currents to a single chamber shouldrequire no further explanation. Sufficient to say that I have found thatthe hotter the air is before being introduced to the fuel, the betterthe combustion obtained.

I/Vhat I claim as new is:

1. In a stove, the combination with a fire pot, an air heating chamberhaving a pocket which is closed at its lower end and extends downwardlywithin the stove toward the fire pot, said pocket communicating with theair heating chamber, a bafiie plate in said chamber and extending withinsaid pocket to direct air toward the bottom thereof, means for supplyingair to the air heating chamber, a tube for delivering heated air fromthe pocket to the fire pot, and an exit flue located above the fire pot.

2. In a stove, the combination with an air heating chamber having apocket which is closed at its lower end and a bafiie plate extending insaid pocket, means for supplying air to the air heating chamber, a tubefor delivering the heated air from the pocket to a fire pot, a fire potformed with a series of slots, an air heating chamber surrounr'ling saidfire pot and with which said slots communicate, means for supplying thelatter air heating chamber withair, the air delivered from the tube andthe slots in the fire pot mixing under the influence of the draft, andan exit flue above the fire pot, said exit flue being located to causethe escaping products of combustion to contact with the closed end ofthe pocket to heat the air passing through said pocket to the tube.

3. In a stove, the combination with a fire pot, of means for introducinga seriesof sheets of air therein, means having an air pocket forintroducing a supply of heated air above the fuel, and an exit fluelocated above the fire pot, said exit fiue being positioned to cause theescaping products of combustion to contact with the pocket to heat theair passing therethrough.

4. In a stove, the combination with a fire pot, of an air heatingchamber having an air pocket closed at its lower end and communicatin atits upper end with the air heating chain er, a tube for directing heatedair from the pocket to the fire pot, and a plurality of means havingtheir inlets at different levels for introducing air to the air heatingchamline located at or near the top of the stove.

her, the air introduced to said air heating chamber passing through thepocket and thence to the tube to the fire pot.

5. In a stove, the combination of a fire pot with an air heating chamberformed with a pocket at or near the top of the stove, said pocket beingclosed at its lower end and communicating at its upper end with the airheating, chamber, a tube for directing heated air from the pocket to thefire pot, and an exit l l l 6; In a stove, the combination with a fire lpot, of an air heating chamber formed above the fire pot near the top ofthe stove and having a pocket and a baffle plate depending from the topof the chamber and into the pocket, a tube for directing heated air fromthe pocket to the fire pot, a damper for conl trolling the heated airpassing through the l tube to the fire pot, means having air inlets atdifferent levels for supplying air to the air heating chamber, and anexit fiue located at l or near the top of the stove.

7. In a stove, the combination with a casing, a fire pot, and a stovetop, a pocket en- 1 tending within the stove and toward the fire l pot,a bafiie plate suspended within the pocket and terminating a shortdistance from the bottom thereof to form a passage, means 1 fordirecting the heated air from the pocket to the fire pot, means forsupplying air to the pocket, and an exit flue communicating with i thestove at a point above the plane of the pocket.

8. In a stove, the combination with a casi ing, a fire pot, a main airheating chamber near the top of the stove and having a pocket, a tube,an auxiliary air heating chamber above the tube formed with openingsconil municating with said main air heating chaml her and the tube, adamper to control the air a admitted to the tube and chamber, and anexit fine above the pocket, the products of l combustion passing to theexit flue contacting with the pocket to heat the air therein. i

9. in stove, the combination with a casing, a fire pot spaced from thecasing to form 3 an air heating chamber, an air heating chamber formedat the top of the stove and having 1 a depending pocket which is closedat its lower end, a bafiie plate in the pocket, means 1 pot,

- pocket to the fire pot "or introducing air to the air heating chamberat the top of the stove, fiues opening to the atmosphere at the bottomfor introducing air to said air heating chamber, said fines beinglocated inside the casing and passing through the space between thecasing and the fire pot, a tube for directing air from the pocket to thefire pot, and an exit flue cominunicating 'ith the stove above thepocket.

in a stove, the combination with a fire an air heating chamber having adepending poclret closed at the bottom and in open communication at thetop with said air heating chamber, a bafiie plate depending from the airheating chamber and into the pocket, a tube for directing heated airpassing through the pocket to the fire pot, and an exit finecommunicating with the stove at or near the top and above the plane ofthe pocket.

11. In a stove, the combination with a casing, of a fire pot, an airheating chamber located at or near the top of the stove and having adepending pocket which communicates with said air heating chamber, atube having an opening to direct heated air from the and other openingswhich communicate with the interior of the stove, a valve formed withopenings and operating in the tube, said openings being positioned thatair may be directed from the pocket to the tube to the fire pot ordirect to the interior of the stove above the fire pot, and an exit fiuecommunicating with the stove above the plane of the openings in thetube.

12. In a stove, the combination with a casing, a main air heatingchamber at or near the top of the stove, having a pocket closed at itslower end and communicating at its upper end with said air heatingchamber, an auxiliary air heating chamber communicating with. the mainair heating chamber, a tube for directing heated air from the pocket tothe fire pot, and an exit fiue at or near the stove top.

EDWIN R. CAHOONE.

Witnesses FRANK SHRAUDER, J NO. IMIRIE.

